Possible Clues:

• Monument not cheap to be rebuilt
• Can't hope to replace those who fell on it
• Fitting person to be exalted in a church monument
• Monument to people whose remains are interred elsewhere
• War memorial constructed on path behind church
• Conservative in agreement about local war memorial
• Monument honouring persons buried elsewhere
• What divides Whitehall is not cheap to arrange
• It's not cheap to build a monument
• Once fallen at the front, troops are permanently honoured here